stevens



UNITED STATES -ATENT OFFICE.

` E: M. STEVENS, OF BOSTON, MASSACHUSETTS, ASSIGNAOR TO ALFRED B.

RLY, or SAME PLAGE.

aoUNDiNe-MAci-HNE.

fin g apartof this speciiicatiomfin which- Figure lis atop view; Fig. 2, a side elevation Fig 3, an edge view of the sliding carriage, showing the appendages to its under side. n n

Like parts are indicated by the same letters i i all the drawings. r

The nature of my invention consists, tirst,

v in, thevv use of a stationary pattern, in combination, or connection with atraveling cutter; second, in combining a yielding cutter with a traveling-carriage, for rounding, paring, or cutting out leather and analogous substances to a pattern which may be stationary; third,

in so 4constructing and arranging the ltraveling cutter that its cutting-edge shall substantially correspond with the center of motion of its shank; fourth, inlso forming and arrangingjhe traveling cutter that while inY operation its edge shall be turned and presented at ail times, so as to cut the material in a line 'substantially parallel to, or in the same plane with, the edge of the pattern fifth, in so ar ranging the traveling knife thatit may be adjusted to-cut the edge of the leather, 85o., to any required bevel sixth, in the combination ofaspring with the traveling cutter for the purpose ofkeeping'the latter np to the pattern.; and seventh, in so constructing the pattern and clamp-that one or both ot' them may beturned for the purpose of'cutting from the strip (heel. and toe alternately) when the pattern islof such a'fcrm as to make it desirable. To'enable others skilled inthe art to make l and use my invention, I will now describe its constrnctionfand operation. l

A is a cast-iron table or stand provided Ywith legs B. The top of the -table A is tiat, and furnished with tracks or ways,-C, l), and -EFig. 1, raised about one eighth of an inch above the 'general surface, .and pla-ned or smoothed, so that the traine which carries tLe rounding-knife may slide easily over them'.

a is a groove through the top of the table, between the track E and the form or plate b', the edge of which is parallel with the track E, andthe surt'aceot which is tlush with the cross-bar below the table and held inplace by means ofthe screws G G.

H is a start projecting from and plate b.

I is a removable pattern or guide, ot' the exact contour ofthe shoe-sole or other article to be pared or rounded, and against the edge of which the cuttingknit`e is pressed.

O is a vertical, shaft passing through the plate b and start II, its upper end entering a hole in the center of the pattern I, while its lower end is provided with. a-pinion7 Q.

B. is a sliding bolt, provided with a rack, (as shown by dotted lines in Fig. 1,) which engages with the cogs ot' pinion Q.A By sliding ont or in this bolt R itis obvious that the shaft O and the pattern I, which rests upon it, can be turned when it is required to cut heel and toe alternately.

pattern I, when not pressed upon from above, is lifted up so as to be free to turn.

' d' d are pins fast in the starts- F F, and projecting up into holes in the pattern I, whereby the latter is held in place.

J is the clamp, the contour ot which correspends with that of the pattern I. The latter, however, projects slightly beyond the clamp,

The bottom ot` this clainp,`as`v shown in Fig. 2, has around its edge a row of conical points, the design of which is to press into the material to be cut or rounded and prevent the same from slipping. ,l

K is a shaft passing through the center of the bar S, which rests on the studs T T, the lower end of said shaft entering a hole in the center ot' the clamp J, vwhereby the latter is raisedand turned. The upper end of theshait K is slotted so as to receive the lever L, which .turns 'on the fulcrum g.

M M are little studs provided with projecting heads or shoulders, by means of which same, the'form 'b' resting on starts from a- 1J is a spiral spring, by means of which thel as shown'in the drawings, Figs. l and 2,

' thelevcr L and its appendages are kept down, ai represented in F-ig. 2, .one arm ofthe lever `V under the table and approximately parallel with the groove a', as represented in Figs; 1 and2. One ofthe spur-pulleys turns on an avle, X, fast to across-piecender the table, andthe other is fast to the top ot' the shaft NV, which also turns in suitable bearings in a cross-piece under the table. c

Y is 'a bevel-pinion attached to the lower en'l ofthe sha-ft W.

Z is a smaller bevel-pinion, fast to the shaft e, and engaging with the pinion Y.

b is 'a' crank, and c a handle, by turing which the chain-bolt U and its appendages are made to move.

d is' the traveling carriage, the shape ot' which is shown in Figs. 1 and 2, the under side being smooth and resting on the raised tracks C D E. The inner point of this carriage eX- tends a little beyond the g`roove a', and it is provided on its under side with two pins or iriction-rollers ar so, (sec Fig. 3,) which traverse in the grooveu, thereby guiding said car' riage'. and Vkeeping it at right angles to said groove. Between said friction-rollersis apin, u, projecting downward through the groove a into a link, hf, which is attached to'thc chain U b'y means ot' the pivot i', whereby Vthe carriage will be drawn along around the 'pattern l by the chain.

e is a plate, (theshape ot' which is shown in Fig. 1), which slides on suitable ways on the top of the sides ot' the carriage d, m m being cleats to keep the plate e in place. The sliding plate e is pressed toward the patternl by means of the spring n, (the shape and position ot' which are shown in Fig. 1,) said spring being held in place by the set-screw 0. rlhe free end of this spring bears against a nub on one end of the lever I', which is at-v tached to the bottoni of the plate by means of the pivotq. More or less tension may be given to the spring n by moving the lever P, which is held in place at itsouter end' by the pin r, the latter being inserted in any one ot' the holes (shown in Fig. 1) on the outer edge of the plate e.

t is a sliding pin, held in place by ineans of the hasp j", which enters an annular groove in the saine, the object of said pin being to hold the free end of the spring n, when pushed in behind it, ,for more conveniently inserting or arranging the rounding-knife.

s is a lever, one end of which is pivoted to one of the cleats m, the free end of the same extending beyond the opposite cleat.

j is a piu projecting' above the upper side ot' the plate c, the desigrrot' said pin being to of which the slide e and its appendages may be moved back from the pattern L Projecting from the under side of the lever s is a short pin, which may be depressed so as to e'nter one of the holes in the righthand cleat m, (see Fig. 1,) by means of which the slide c may be .held back from the pattern I.

fis a block titted into a corresponding slot in the end of the slide e, and confined by the pin g, on which it can be turned, so as to give knife j.

his a set-screw the inner end of which rests against the block f and prevents it from turnlng.

is round, and turns freely in its bearing in the end of the Vblock j'. The edge of' the knit'eis intended to be opposite the center of the round tern I. The side ot' the shank 'i which bears on the edge of the pattern l', turning and to always touch said pattern without rocking 0n it.

7c is an arln attached to the betteln of the shank fi of the cutter, andl. is a -rubber or other suitable spring, the action ot` which arm and spring is to draw the edge of theknifefrein the edge of the pattern l when Ilot forced up'by the action ot' thc spring a.

Frein the above description'it is obvious that a strip of leather or other analogous substance placed upon the pattern l, and coniined by the lclamp J, will be cut or rounded t0 the exact contour ot' said pattern, and at any rcquired bevel.

Mytinvention is designed more particularly and styles ot' whichinay be roundeAl with the' saine machine bythe employment et' patterns in all cases pressing the iounding-knit'e close to the pattern.

When required to cut heel and-t0e altersavingstock, the pattern I and clamp J may be turned as' described above.

Having thus described the construction and operation et' my improvement, what I claim in rounding-machines, substantially as and for the purpose described, is

1. The use of a stationary pattern in coinbinalion with a continuously-travcling cutter.

2. Combining a yielding o r sliding cutter with a traveling carriage.

3. So constructing and arranging the traveling cutter thatits cutting-edge shall substantially corr'espond with the center of inotion of its shank. l.

. 4. So forming and arranging' the traveling cutter that while in operation its edge shall i be turned and presented at all times so as to operate as a iuleruni for the lever s, by means any required inclination to-the' roundingj is the rounding-knife, the shank i of which shank 1., so that it may always touch the patguiding the knife j, is slightly concave, so as for rounding"7 boot and shoe soles, all sizes I of the size and style required, the spring n" nately from a large strip for the purpose ot' lt" A i 43.958 3 i; ent thel material in a line substantially paralthat one er both of them may beturnefor t; lel -to or in the same plane with the edgerof thepurposeof cutting heelatdftoeiltemately.'

' the pattern; 8. The'lever P, in combnatien'with the 5. So arranging the treyeling knife that it spingin and slide e, for adjusting -thepressmay be set or adjusted to cut the edge of the ure of the roundingkhife to patterns of dit'- leatlier, &e., to any required bevel. ferent sizes. L l 6. vThe combina-tionf' a. spring with the E. M; STEVENS. t1 aveling cutterY for 'the purpose-of keeping Witnesses: l the latter up to the pattern. N. COUNT, JUNR.,

7. So constructing the pattern and' clam A. F. BADGER, 

